Isaiah

Then opened he their understanding, that they might understand the scriptures,

For this people’s heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.

And the Jews marvelled, saying, How knoweth this man letters, having never learned?

Jesus answered them, and said, My doctrine is not mine, but his that sent me.